Question

If the volume of a right circular cone of height 9cm is 48∏cubic cm ,then the radius of base is



a)3cm

b)4cm

c)5cm

d)6cm


​

Answer 1

Step-by-step explanation:

v=⅓πr²h

48π=⅓πr²9

r²=16

r=4

Answer 2

Answer:

b) 4cm

Step-by-step explanation:

since the formula for volume of a right circular come is 1/3.πr²h

so, 1/3.πr²h=48π

π gets cancel both sides

1/3r²×9=48

r²×3 = 48.

r²=48/3

r²=16

r=√16

r=4cm